In Java, how to append a string more efficiently?

 

This question already has an answer here:

  • Difference between StringBuilder and StringBuffer 31 answers

    • Use StringBuilder class. It is more efficient at what you are trying to do.

    You should use the StringBuilder class. 

    StringBuilder stringBuilder = new StringBuilder();

stringBuilder.append("Some text");
stringBuilder.append("Some text");
stringBuilder.append("Some text");

String finalString = stringBuilder.toString();

    In addition, please visit:

  • "How Java optimize the code with StringBuilder?"
  • "StringBuilder vs String concatenation in toString() in Java"

    • You can use StringBuffer or StringBuilder for this. Both are for dynamic string manipulation. StringBuffer is thread-safe where as StringBuilder is not.

    Use StringBuffer in a multi-thread environment. But if it is single threaded StringBuilder is recommended and it is much faster than StringBuffer .

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